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Physics

Physics
The unit of noise pollution (level) is :

Decibel
None of these
Decimal
Ppm

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Physics
The threshold frequency is the frequency below which :

Photo current decreases with voltage
Photo current increases with voltage
Photo current is constant
Photo electric emission is not possible

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Physics
Air pressure is usually highest when the air is

Warm and dry
Warm and moist
Cool and moist
Cool and dry

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Physics
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

Conduction
Convection
Both conduction and convection
Radiation

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Physics
The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

4 T
1 T
8 T
2 T

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Physics
The average kinetic energy of the molecules of an ideal gas is directly proportional to

Velocity of Molecules
Temperature of environment
Mass of Molecules
Absolute temperature of the gas

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MORE MCQ ON Physics

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